Why Fifty Was Old
The assessment that the Punín-2 man was approximately 50 years old at death is established through osteological analysis — the study of the skeletal material to infer biological age.
In forensic and archaeological contexts, biological age at death is estimated from the state of the skeleton rather than from any documentary evidence. The specific markers used include the degeneration of joint surfaces (particularly the pubic symphysis and the auricular surface of the ilium), the fusion of skeletal growth plates, the degree of dental wear, and various other skeletal changes that proceed at predictable average rates as people age.
These markers provide estimates that have ranges of uncertainty rather than precise ages. The designation of “approximately 50 years old” for the Punín-2 individual means that the osteological evidence is consistent with someone in their fifth decade of life, with uncertainty extending in both directions.
Fifty years old, in the context of a prehistoric hunter-gatherer population in the high Andes, was a substantial age. Modern hunter-gatherer populations, studied ethnographically over the past century, show life expectancy at birth in the range of 30 to 40 years — but much of this low average reflects high childhood mortality. People who survive to adulthood in such populations often live to ages that are not dramatically different from modern populations in less well-resourced contexts.
A 50-year-old man in a hunter-gatherer society in the Andean highlands was, by any reasonable standard, someone who had made it to old age for his time and place. He had survived childhood illnesses and injuries, the physical hazards of hunting, the periodic food shortages that would have occurred when resources were scarce, and whatever specific circumstances of his life had presented risks over five decades.
At 50, he would have been a repository of knowledge. In oral cultures without writing, the knowledge that matters — ecological knowledge of the landscape, technical knowledge of tools and processes, social knowledge of relationships and obligations, historical knowledge of the community’s past — is held in the minds and hands of experienced people. A 50-year-old man in the Chimborazo hunter-gatherer community was someone who had spent decades accumulating exactly this kind of knowledge, and whose presence in the community represented an irreplaceable resource.
His death at 50 was, in this context, the loss of a significant portion of the community’s accumulated knowledge. Whatever specific things he knew — where specific resources could be found in specific seasons, how to make specific tools, what specific plants were edible or medicinal, what the community’s oral history recorded about its own past — died with him.
What survived was his skull. And three thousand years later, his face has been given back.